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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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REGULATING OR CONTROLLING COMBUSTION( control devices specially adapted for fluidised-bed combustion apparatus F23C 10/28 ; condition reponsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B 1/187 )
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Regulating fuel supply
F23N 1/002
.
{
using electronic means( F23N 1/04 to F23N 1/10 take precedence )
}
F23N 1/005
.
{
using electrical or electromechanical means( F23N 1/04 to F23N 1/10 take precedence )
}
F23N 1/007
.
{
using mechanical means( F23N 1/04 to F23N 1/10 take precedence )
}
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F23N 1/02
.
conjointly with air supply
F23N 1/022
. .
{
using electronic means
}
F23N 1/025
. .
{
using electrical or electromechanical means
}
F23N 1/027
. .
{
using mechanical means
}
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F23N 1/04
.
conjointly with air supply and with draught
F23N 1/042
. .
{
using electronic means
}
F23N 1/045
. .
{
using electrical or electromechanical means
}
F23N 1/047
. .
{
using mechanical means
}
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F23N 1/06
.
conjointly with draught
F23N 1/062
. .
{
using electronic means
}
F23N 1/065
. .
{
using electrical or electromechanical means
}
F23N 1/067
. .
{
using mechanical means
}
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F23N 1/08
.
conjointly with another medium, e.g. boiler water
F23N 1/082
. .
{
using electronic means
}
F23N 1/085
. .
{
using electrical or electromechanical means
}
F23N 1/087
. .
{
using mechanical means
}
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F23N 1/10
. .
and with air supply or draught
F23N 1/102
. . .
{
using electronic means
}
F23N 1/105
. . .
{
using electrical or electromechanical means
}
F23N 1/107
. . .
{
using mechanical means
}
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Regulating air supply or draught( conjointly with fuel supply F23N 1/00 )
F23N 3/002
.
{
using electronic means( F23N 3/02 to F23N 3/08 take precedence )
}
F23N 3/005
.
{
using electrical or electromechanical means( F23N 3/02 to F23N 3/08 take precedence )
}
F23N 3/007
.
{
using mechanical means( F23N 3/02 to F23N 3/08 take precedence )
}
F23N 3/02
.
Regulating draught by direct pressure operation of single valves or dampers
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F23N 3/04
.
by operation of single valves or dampers by temperature sensitive elements
F23N 3/042
. .
{
using electronic means
}
F23N 3/045
. .
{
using electrical or electromechanical means
}
F23N 3/047
. .
{
using mechanical means
}
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.
by conjoint operation of two or more valves or dampers( F23N 3/08 takes precedence )
F23N 3/065
. .
{
using mechanical means
}
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F23N 3/08
.
by power-assisted systems
F23N 3/082
. .
{
using electronic means
}
F23N 3/085
. .
{
using electrical or electromechanical means
}
F23N 3/087
. .
{
using mechanical means
}
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Systems for controlling combustion( F23N 1/00 , F23N 3/00 take precedence )
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F23N 5/003
.
{
using detectors sensitive to combustion gas properties( F23N 5/02 , F23N 5/18 to F23N 5/26 take precedence )
}
F23N 5/006
. .
{
the detector being sensitive to oxygen
}
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F23N 5/02
.
using devices responsive to thermal changes or to thermal expansion of a medium
F23N 5/022
. .
{
using electronic means( F23N 5/04 to F23N 5/14 take precedence )
}
F23N 5/025
. .
{
using electrical or electromechanical means( F23N 5/04 to F23N 5/14 take precedence )
}
F23N 5/027
. .
{
using mechanical means( F23N 5/04 to F23N 5/14 take precedence )
}
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F23N 5/04
. .
using bimetallic elements
F23N 5/042
. . .
{
using electronic means
}
F23N 5/045
. . .
{
using electrical or electromechanical means
}
F23N 5/047
. . .
{
using mechanical means
}
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F23N 5/06
. .
using bellows ; using diaphragms
F23N 5/062
. . .
{
using electronic means
}
F23N 5/065
. . .
{
using electrical or electromechanical means
}
F23N 5/067
. . .
{
using mechanical means
}
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F23N 5/08
. .
using light-sensitive elements
F23N 5/082
. . .
{
using electronic means
}
F23N 5/085
. . .
{
using electrical or electromechanical means
}
F23N 5/087
. . .
{
using mechanical means
}
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F23N 5/10
. .
using thermocouples
F23N 5/102
. . .
{
using electronic means
}
F23N 5/105
. . .
{
using electrical or electromechanical means
}
F23N 5/107
. . .
{
using mechanical means e.g. safety valves
}
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F23N 5/12
. .
using ionisation-sensitive elements, i.e. flame rods
{
( testing of other ignition means, e.g. flame F02P 17/12 ; analysing gases by investigating the ionisation by using heat G01N 27/626 )
}
F23N 5/123
. . .
{
using electronic means
}
F23N 5/126
. . .
{
using electrical or electromechanical means
}
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F23N 5/14
. .
using thermo-sensitive resistors
F23N 5/143
. . .
{
using electronic means
}
F23N 5/146
. . .
{
using electrical or electromechanical means
}
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F23N 5/16
.
using noise-sensitive detectors
F23N 2005/165
. .
{
with ultrasonic means
}
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F23N 5/18
.
using detectors sensitive to rate of flow of air or fuel
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F23N 2005/181
. .
{
using detectors sensitive to rate of flow of air
}
F23N 2005/182
. . .
{
Air flow switch
}
F23N 5/184
. .
{
using electronic means
}
F23N 2005/185
. .
{
using detectors sensitive to rate of flow of fuel
}
F23N 5/187
. .
{
using electrical or electromechanical means
}
F23N 5/188
. .
{
using mechanical means
}
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F23N 5/20
.
with a time programme acting through electrical means, e.g. using time-delay relays
F23N 5/203
. .
{
using electronic means
}
F23N 5/206
. .
{
using electrical or electromechanical means
}
F23N 5/22
.
with a time programme acting through mechanical means, e.g. using cams
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F23N 5/24
.
Preventing development of abnormal or undesired conditions, i.e. safety arrangements( F23N 5/02 to F23N 5/18 take precedence )
F23N 5/242
. .
{
using electronic means
}
F23N 5/245
. .
{
using electrical or electromechanical means
}
F23N 5/247
. .
{
using mechanical means
}
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F23N 5/26
.
Details
F23N 5/265
. .
{
using electronic means
}
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F23N 2021/00
Pretreatment or prehandling
F23N 2021/02
.
using belt conveyers
F23N 2021/04
.
Preheating liquid fuel
F23N 2021/06
.
Preheating gaseous fuel
F23N 2021/08
.
Preheating the air
F23N 2021/10
.
Analysing fuel properties, e.g. density, calorific
F23N 2021/12
.
Recycling exhaust gases
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F23N 2023/00
Signal processing ; Details thereof
F23N 2023/02
.
Multiplex transmission
F23N 2023/04
.
Memory
F23N 2023/06
.
Sampling
F23N 2023/08
.
Microprocessor ; Microcomputer
F23N 2023/10
.
Correlation
F23N 2023/12
.
Integration
F23N 2023/14
.
Differentiation
F23N 2023/16
.
Measuring bridge
F23N 2023/18
.
Chopper
F23N 2023/20
.
Opto-coupler
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F23N 2023/22
.
Timing network
F23N 2023/24
. .
with bimetallic elements
F23N 2023/26
. .
with capacitors
F23N 2023/28
. .
with more than one timing element
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F23N 2023/30
.
Switches
F23N 2023/32
. .
Reed switches
F23N 2023/34
.
with feedforward processing
F23N 2023/36
.
PID signal processing
F23N 2023/38
.
Remote control
F23N 2023/40
.
Simulation
F23N 2023/42
.
Function generator
F23N 2023/44
.
Optimum control
F23N 2023/46
.
Identification
F23N 2023/48
.
Learning / Adaptive control
F23N 2023/50
.
Human control
F23N 2023/52
.
Fuzzy logic
F23N 2023/54
.
Recording
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F23N 2025/00
Measuring
F23N 2025/02
.
filling height in burners
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F23N 2025/04
.
pressure
F23N 2025/06
. .
for determining flow
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F23N 2025/08
.
temperature
F23N 2025/10
. .
stack temperature
F23N 2025/12
. .
room temperature
F23N 2025/13
. .
outdoor temperature
F23N 2025/14
. .
Ambient temperature around burners
F23N 2025/16
. .
burner temperature
F23N 2025/18
. .
feedwater temperature
F23N 2025/19
. .
outlet temperature water heat-exchanger
F23N 2025/20
. .
entrant temperature
F23N 2025/21
. .
outlet temperature
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F23N 2025/22
.
heat losses
F23N 2025/24
. .
indicated in an amount of money
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F23N 2025/26
.
humidity
F23N 2025/30
. .
measuring lambda
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F23N 2027/00
Ingnition or checking
F23N 2027/02
.
Starting or ignition cycles
F23N 2027/04
.
Prepurge
F23N 2027/06
.
Postpurge
F23N 2027/08
.
Hold fire apparatus
F23N 2027/10
.
Sequential burner running
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F23N 2027/12
.
Burner simulation or checking
F23N 2027/14
. .
Flame simulation
F23N 2027/16
. .
Checking components, e.g. electronic
F23N 2027/18
.
Applying test signals, e.g. periodic
F23N 2027/20
.
Calibrating devices
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F23N 2027/22
.
Pilot burners( ignition circuits therefor F23N 2027/32 )
F23N 2027/24
. .
the pilot burner not burning continuously
F23N 2027/26
. .
comprising two or more distinct pilot burners
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F23N 2027/28
.
Ignition circuits
F23N 2027/30
. .
for pilot burners
F23N 2027/32
.
Igniting for a predetermined number of cycles
F23N 2027/34
.
Continuously applied ignition cycles
F23N 2027/36
.
Spark ignition, e.g. by means of a high voltage
F23N 2027/38
.
Electrical resistance ignition
F23N 2027/40
.
Catalytic ignition
F23N 2027/42
.
Ceramic glow ignition
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F23N 2029/00
Flame sensors
F23N 2029/02
.
Pilot flame sensors
F23N 2029/04
.
sensitive to the colour of flames
F23N 2029/06
.
with periodical shutters ; Modulation signals
F23N 2029/08
.
detecting flame flicker
F23N 2029/10
.
comprising application of periodical fuel flow fluctuations
F23N 2029/12
.
with flame rectification current detecting means
F23N 2029/14
.
using two or more different types of flame sensor
F23N 2029/16
.
using two or more of the same types of flame sensor
F23N 2029/18
.
Flame sensor cooling means
F23N 2029/20
.
Camera viewing
F23N 2029/22
.
the sensor`s sensivity being variable
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F23N 2031/00
Fail safe
F23N 2031/02
.
using electric energy accumulators
F23N 2031/04
.
for electrical power failures
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F23N 2031/06
.
for flame failures
F23N 2031/08
. .
for pilot flame failures
F23N 2031/10
.
for component failures
F23N 2031/12
.
for ignition failures
F23N 2031/14
.
for earthquakes
F23N 2031/16
.
using melting materials or shape memory alloys
F23N 2031/18
.
Detecting fluid leaks
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F23N 2031/20
.
Warning devices
F23N 2031/22
. .
using warning lamps
F23N 2031/24
.
Freezing
F23N 2031/26
.
for clogging air inlet
F23N 2031/28
.
preventing flash-back or blow-back
F23N 2031/30
.
Representation of working time
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F23N 2033/00
Ventilators
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F23N 2033/02
.
in stacks
F23N 2033/04
. .
with variable speed
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F23N 2033/06
.
at the air intake
F23N 2033/08
. .
with variable speed
F23N 2033/10
.
forcing air through heat exchangers
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F23N 2035/00
Valves, nozzles or pumps
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F23N 2035/02
.
Air or combustion gas valves or dampers
F23N 2035/04
. .
in stacks
F23N 2035/06
. .
at the air intake
F23N 2035/08
. .
used with heat exchanges
F23N 2035/10
. .
power assisted, e.g. using electric motors
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F23N 2035/12
.
Fuel valves
F23N 2035/14
. .
electromagnetically operated
F23N 2035/16
. .
variable flow or proportional valves
F23N 2035/18
. .
Groups of two or more valves
F23N 2035/20
. .
Membrane valves
F23N 2035/22
. .
cooperating with magnets
F23N 2035/24
. .
Valve details
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F23N 2035/26
.
Fuel nozzles
F23N 2035/28
. .
Spray fuel nozzles
F23N 2035/30
.
Pumps
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F23N 2037/00
Controlling( F23N 5/00 takes precedence )
F23N 2037/02
.
two or more burners
F23N 2037/04
.
at two or more different localities
F23N 2037/06
.
two predeterming temperatures, e.g. day-night
F23N 2037/08
.
two or more different types of fuel simultaneously
F23N 2037/10
.
High or low fire
F23N 2037/12
.
catalytic burners
F23N 2037/14
.
burners with gasification or vaporizer elements
F23N 2037/16
.
secondary air
F23N 2037/18
.
fluidized bed burners
F23N 2037/20
.
one or more bypass conduits
F23N 2037/22
.
water injection
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F23N 2037/24
.
height of burner
F23N 2037/26
. .
oxygen-air ratio
F23N 2037/28
. .
oxygen as pure oxydant
F23N 2037/30
. .
matrix burners
F23N 2037/32
. .
Nox
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F23N 2039/00
Fuels
F23N 2039/02
.
Solid fuels
F23N 2039/04
.
Gaseous fuels
F23N 2039/06
.
Liquid fuels
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F23N 2041/00
Applications
F23N 2041/02
.
Space-heating
F23N 2041/04
.
Heating water
F23N 2041/06
.
Space-heating and heating water
F23N 2041/08
.
Household apparatus
F23N 2041/10
.
Generating vapour
F23N 2041/11
.
Torches
F23N 2041/12
.
Stack-torches
F23N 2041/14
.
Vehicle heating, the heat being derived otherwise than from the propulsion plant
F23N 2041/16
.
Spectrometer burners
F23N 2041/18
.
Incinerating apparatus
F23N 2041/20
.
Gas turbines
F23N 2041/22
.
Absorption refrigerator
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F23N 2900/00
Special features of, or arrangements for controlling combustion
F23N 2900/01001
.
Micro Electro Mechanical Systems (MEMS) for controlling fuel supply to burners
F23N 2900/01002
.
Electromagnetically operated fuel valves with a single solenoid controlling two or more cores
F23N 2900/05001
.
Measuring CO content in flue gas
F23N 2900/05002
.
Measuring CO2 content in flue gas
F23N 2900/05003
.
Measuring NOx content in flue gas
F23N 2900/05004
.
Details of components, e.g. connecting adaptors
F23N 2900/05005
.
Mounting arrangements for sensing, detecting or measuring devices
F23N 2900/05006
.
Controlling systems using neuronal networks
F23N 2900/05101
.
Connections between thermocouple and magnetic valves, e.g. by plug and socket connectors
F23N 2900/05181
.
Controlling air to fuel ratio by using a single differential pressure detector
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013